Re: [Qemu-devel] [PATCH v3 00/26] q35 qemu support

[Gerd Hoffmann]

On 10/22/12 12:08, Michael S. Tsirkin wrote:
> On Mon, Oct 22, 2012 at 07:58:32AM +0200, Gerd Hoffmann wrote:
>>   Hi,
>>
>>> Would it make sense to temporarily rename the machine type e.g.
>>> pc-q35-experimental to stress it's not fully supported?
>>
>> I don't think this is needed as piix will continue to be the default.
> 
> Well q35 is not yet 100% ready.

I know.

> The point was to hide it from libvirt.
> libvirt should support pc-q35 not pc-q35-experimental, then
> it will not cause trouble.

You'll not going to hide it that way.  Libvirt will just 'qemu -M ?'
where q35 will show up even if you rename it to be postfixed -experimental.

But as long as 'pc' continues to be the default the causal user will
never ever notice q35 is there, at least not with virt-manager (dunno
about boxes) as there is simply no gui way to pick the machine type.
You'll have to explicitly "virsh edit $guest" to switch it to q35.

So I'm not sure what you are worryed about.  But in any case this needs
discussion with the libvirt folks to make sure it will actually work as
intended.  /me tends to think a experimental bit in machine_info (which
is then printed by 'qemu -M ?' and the QOM-version of that) is more
useful than playing tricks with the name.

cheers,
  Gerd